High temperature cast aluminum alloy for cylinder heads

An aluminum alloy suitable for sand casting, permanent mold, or semi-permanent mold casting, the aluminum alloy comprising:

• about 5 to about 9 weight percent silicon;
• about 0.6 to about 1.0 weight percent copper;
• about 0.4 to about 0.5 weight percent magnesium;
• about 0.25 to about 0.35 weight percent chromium;
• about 0.1 to about 0.2 weight percent each of zirconium, vanadium, and cobalt;
• about 0 to about 0.02 weight percent each of strontium and sodium;
• about 0 to about 0.2 weight percent titanium;
• about 0 to about 0.15 weight percent iron
• about 0 to about 0.15 weight percent manganese;
• about 0 to about 0.1 weight percent zinc;
• and
• about 0 to about 0.05 weight percent of other trace elements.

An aluminum alloy suitable for sand casting, permanent mold, or semi-permanent mold casting, the aluminum alloy comprising:

• about 6.5 to about 7.5 weight percent silicon;
• about 0.7 to about 0.8 weight percent copper;
• about 0.35 to about 0.45 weight percent magnesium;
• about 0.3 to about 0.35 weight percent chromium;
• about 0.1 to about 0.15 weight percent each of zirconium, vanadium, and cobalt;
• about 0.005 to about 0.02 weight percent strontium;
• about 0 to about 0.2 weight percent titanium;
• about 0 to about 0.05 weight percent each of barium, calcium, tin, nickel, and phosphorous;
• about 0 to about 0.15 weight percent iron;
• about 0 to about 0.10 weight percent manganese;
• about 0 to about 0.10 weight percent zinc;
• and
• about 0 to about 0.05 weight percent of other trace elements.

An aluminum alloy suitable for sand casting, permanent mold, or semi-permanent mold casting, the aluminum alloy consisting of:

• about 7.0 weight percent silicon;
• about 1.0 weight percent copper;
• about 0.4 weight percent magnesium;
• about 0.35 weight percent chromium;
• about 0.15 weight percent each of zirconium, vanadium, titanium, iron and cobalt;
• about 0.02 weight percent strontium;
• and
• remaining balance aluminum and copper.